Adolf hommel



(No Model.)

A. HUMMEL.

RESERVOIR PEN.

No. 394,183. Patented Dec. 11, 1888.

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TTUHNEYS,

UNTTE STATES PATENT OFFICE.

ADOLF HUMMEL, OF ZURICH, SVITZERLAND.

RESERVOIR-PEN.

SPECIFICATION forming part of Letters Patent No. 394,183, dated December 11, 1888.

Application filed .Inly 16, 1888. Serial No. 280.076. (No model.) I

To a/ZZ whom it may concern.-

Be it known that I, ADOLF IIOMMEL, doctor of medicine, a citizen of Switzerland, residing at Zurich, Switzerland, have invented new and useful Improvements in Reservoir Pens, of which the following is a specification.

The object of niy invention is a fountainpen which is so constructed that the penholder is the reservoir holding the ink, which latter is forced into the pen-nib and withdrawn from the same by a piston operating within the said pen-holder.

In the accompanying drawing is' shown a longitudinal sectional view of a pelnliolder embodying my iiivention.

According to this inveiition I construct a fountain penholder as follows: Tit/hin a cylindrical lower part, C, of the pen-holder is contained a piston, K, having a stein, K of elliptic section, and having a scre\\'thread formed on it. This stem passes upward iirst through an elliptic hole in a disk, S, fixed in a socket, B, which is adjusted on the upper end of the said cylindrical lower part, C, of the stem, whereby the piston and its stein are prevented from rotating; and, secondly, the stem passes tlirough a screwed nut, lll, that is held in the socket l, so that it can be rotated, but cannot shift up or down. To this nut is fixed a tubular cap, A, forming the upper part of the pen-holder, and in which is contained the upper part of the piston-stem K. Thus on rotating the cap A, and with it the screwnut B, in one direction or the other, the piston K and its stem K are moved up or down in the cylindrical part C of the holder. The lower end of this latter is closed by a cap, ll, formed with a socket for the reception of an ordinary steel or other pen, F, and it has also a small tubeMR, proj eoting from it on the under side ot the pen, so that its open outer end is situated against the point of the latter. Thus assuming the piston to have been moved to the lower end of the cylindrical part of the holder, then on holding the pen-holder so that the said small tube is immersed in ink, and turning the cap at the upper end so that the piston is drawn upward thereby, the ink will be drawn into the cylindrical part of the holder, so as to charge this with a supply of ink.

On using the pen-holder the cap is gradually turned in the contrary direction, so as to force the piston downward, thus causing the ink to flow from the tube into the pen.

The stem K of the piston K can also be form ed hollow, with an internal screw-thread, and the rotatable nut B be situated inside it and connected by a stem to the upper end of the' cap A. w

Having thus described my invention and the manner of employing the same, what I claim as my invention, and wish to have secured to me by Letters Patent of the United States of America, is-

l. A fountain pen-holder which is filled with ink and ink supplied to the pen by simply turning a stem, and thus raising or lowering` a piston by means of a threaded pistonrod and a nut attached to the other half of the pen-holder to that in which the piston works.

2. In a fountain pen-holder, the piston K, the stem K, and disk S, fixed in the socket B, in combination with the screwed nut M and tubular cap A, all substantially in the manner and for the purpose described and shown.

In testimony whereof I have signed my name to this specilication in the presence of two subscribing witnesses.

ADOLF -I-IOMMEL.

lllitnesses:

J SMITH, J. W. BRATFORT. 

